JPH069572B2 - Surgical microscope - Google Patents

Description

TECHNICAL FIELD The present invention relates to a surgical microscope.

[Conventional technology]

In the operation under a surgical microscope, it is desired that two observers, that is, an operator and an assistant located in a direction substantially perpendicular to the operator can observe the operation site in the same state.

As means for realizing such a request, for example, Japanese Patent Publication No.
There is a format disclosed in Japanese Patent Laid-Open No. 5-10174. This will be described with reference to FIGS. 9 and 10.

There is a sample (not shown) on the downward extension of the pair of left and right operator's observation optical axes a, while the objective lens 1, auxiliary lenses L _a and L _b , and the beam splitting prism P are provided on the optical axis a. ₁ and P ₁ ′ are arranged respectively. For the method of linearly passing through the beam splitting prisms P ₁ and P ₁ ′, the operator's observation optical axis a
Is extended, and an observation optical system (not shown) is further arranged on the extension, and the operator performs observation with the observation optical system. On the other hand, a pair of assistant observation optical axes b extends in the direction in which the light beams are split and deflected by the beam splitting prisms P ₁ , P ₁ ′, and prisms P ₃ , P ₃ ′, P ₄ , P on the optical axis b. _{4 'and} eyepieces 2,2'assistant's observation optical system consisting of are provided. Therefore, the assistant can observe the same observation images I _n and I _n ′ as the operator by the operator's observation light split by the beam splitting prisms P ₁ and P ₁ ′.

[Problems to be solved by the invention]

However, in the above-mentioned format, the operator and the assistant can observe the surgical site at the same magnification and the same axis, but from the viewpoint of stereoscopic vision, there is a problem that the assistant cannot stereoscopically see the operator even though the operator can see the stereoscopic vision. there were. Since the light flux from the operator side is guided to the assistant side as it is, the left and right visual field image of the observation system for the assistant is the horizontal visual field image seen from the operator's position and becomes the vertical visual field image for the assistant. As a result, the left and right parallaxes required for stereoscopic vision do not occur for the assistant, but the upper and lower parallaxes result.

The present invention has been made in view of the above problems, and an object thereof is to provide a surgical microscope that allows an operator and an assistant to stereoscopically view a surgical site at the same magnification and coaxially.

[Means and Actions for Solving Problems]

The surgical microscope according to the present invention is a surgical microscope in which a pair of left and right variable power optical systems are provided behind a common objective lens, wherein a light splitting member is provided behind each of the pair of variable power optical systems. In a plurality of directions having a predetermined angle with respect to a plane including the pair of variable power optical systems in a plane orthogonal to the optical axis of the variable power optical system, a pair of observation optical paths are respectively directed, The left and right visual field images of the operator observation system and the assistant observation system are made to be the left and right visual field images viewed from the positions of the operator and the assistant, respectively.

This concept will be described in detail with reference to FIGS. 1 to 3.

FIG. 1 is a perspective view showing the basic structure of the present invention, FIG. 2 is a plan view, and 11 is an objective lens. Reference numeral 12 denotes a variable power lens, which is provided as a pair at a distance d so as to form a stereoscopic observation optical system. Reference numeral 13 denotes a pair of first reflecting members that reflects a part of the observation light that has passed through the variable power lens 12 and transmits the rest of the observation light, and the pair of first reflective members 13 are arranged in a plane orthogonal to the optical axes of the pair of variable power lenses 12. Is arranged to reflect light in the direction of an angle θ with respect to the surface including the optical axis of the variable power lens 12, and forms an operator-side observation optical path. Reference numeral 14 denotes a pair of second reflecting members that totally reflects the observation light that has passed through the first reflecting member 13, and the pair of variable magnification lenses 12 is in a plane orthogonal to the optical axes of the pair of variable magnification lenses 12. Is arranged so as to reflect light in the direction of an angle −θ with respect to the surface including the optical axis of, and forms the observation light path on the assistant side.

As described above, the optical path on the operator side and the optical path on the assistant side are the objective lens 1
Since the 1 and the pair of variable magnification lenses 12 are shared, it is possible to observe the same surgical site at the same magnification for both the operator and the assistant by using the same observation optical system (not shown). Reflecting member 13 and second reflecting member 14
Is placed, the left and right optical axis intervals in each optical path are
Since it is the same as dsinθ and the same left and right parallax is obtained by this, the same stereoscopic vision is possible.

Unlike the above, as shown in FIG. 3, the second reflecting member 14 is arranged only on one side of the optical axis, and the other reflecting member 15 is used so that the assistant side observation optical path faces upward. Is also good. Further, unlike the above, the first reflecting member 13 and the second reflecting member 14 may be arranged so that the operator-side observing optical path and the assistant-side observing optical path intersect the optical axes of the pair of variable magnification lenses 12, respectively. good.

Further, in the above case, the operator-side observation optical path and the assistant-side observation optical path are formed in a plane orthogonal to the optical axes of the pair of variable power lenses 12 and at equal angles with respect to the plane including the optical axes of the pair of variable power lenses 12. Although both are tilted so that the same stereoscopic effect is produced, in reality, the operator has a more stereoscopic effect, and the angle formed between the operator's observation optical path and the assistant's observation optical path is a certain value. In order to set to, it is not always necessary to make them equiangular.

〔Example〕

The present invention will be described in detail with reference to the illustrated embodiment. FIG. 4 is a front view of one embodiment, FIG. 5 is a side view, and FIG.
The figure is a plan view.

Reference numeral 16 denotes a third reflecting member, which is arranged in two pairs in each optical path and deflects each optical path upward. Here, the objective lens 11 and the variable power lens 12 compose a mirror body portion 17, and each of the two first reflecting members 13, the second reflecting member 14, and the four third reflecting members 16 are optical path dividing portions (units). Make up 18.
Further, 19 is an image forming lens, and 20 is an eyepiece lens, which form a lens barrel 21. Incidentally, an optical member for erecting an image and changing an emission angle from the eyepiece lens 20 is usually used for the lens barrel 21, but it is omitted. Further, in this embodiment, θ = 45 ° in FIG.
As a result, the operator-side observation light path and the assistant-side observation light path are orthogonal to each other. Further, in this embodiment, the optical path is divided in the horizontal direction by the second reflecting member 14 and the third reflecting member 16, but it is not necessary to be particularly horizontal.

Since the present embodiment has the above-described configuration, the observation light that has passed through the two variable power lenses 12 enters the optical path splitting portion 18, and the light flux reflected and split by the first reflecting member 13 is the third reflection. It is further deflected upward by the member 16, and a stereoscopic image is observed through the imaging lens 19 and the eyepiece lens 20 in the one lens barrel 21. On the other hand, the light flux that has passed through the first reflecting member 13 is totally reflected by the second reflecting member 14 and is deflected upward by the third reflecting member 16, and similarly, the imaging lens 19 and the eyepiece lens in the other lens barrel 21. A stereoscopic image is observed via 20. Therefore, two humans can stereoscopically observe the same surgical site under the same conditions.

In addition, according to this embodiment, two humans can stereoscopically observe the same surgical site under the same conditions simply by adding the optical path dividing member and the lens barrel to the ordinary surgical microscope (stereoscopic microscope). ,
The conventional surgical microscope can be used as it is, and the economical burden is small. Further, since the above member can be removed when unnecessary, it is possible to prevent the mirror body from becoming large.
Further, here, the first reflecting member 13 and the third reflecting member 16 are integrally rotated around each optical axis of each variable power lens 12, and the second reflecting member 14 and the other third reflecting member 16 are integrated. The optical path splitting section 18 is used if the optical axis spacing of each light beam on the exit side of the optical path splitting section 18 is set in advance so as to match the optical axis spacing d on the entrance side. Since the lens barrel 21 before being used can be used also in this case, it is more economically advantageous.

FIG. 7 is an optical path diagram of a main part of the second embodiment, and FIG. 8 is a perspective view of the optical path splitting part 18. Here, it is configured such that recording equipment, which is highly necessary during actual surgery, can be attached. A semi-transmissive second reflecting member 22 is used as the second reflecting member, and an optical path that transmits upward is used as a recording optical path to hold the recording material 23 above the optical path dividing section 18.

In the present embodiment, as described above, the space between the two mirror bodies 21 above the mirror body portion 17 can be effectively used, and there is an advantage that the operation of the operator and the assistant is not obstructed during the surgery. Moreover, since the recording equipment 23, which is a heavy object, is located substantially above the center of gravity of the mirror body portion 21, there is also an advantage that good stability can be maintained even when the microscope is elevated.

〔The invention's effect〕

As described above, according to the surgical microscope of the present invention, the operator and the assistant can stereoscopically view the surgical site with the same magnification and the same axis, and as a result, the assistant can provide sufficient assistance and the safety of surgery is increased. The operation time can be shortened, and there is an effect that the operation can be taught by the instruction from the assistant side. Further, since the above effect can be obtained only by adding a simple optical system to the optical system of the existing surgical microscope, there is an advantage that the economical burden can be reduced.

[Brief description of drawings]

1 and 2 are a perspective view and a plan view, respectively, showing the basic configuration of the present invention, FIG. 3 is a perspective view of a modified example, and FIGS.
The drawings are respectively a front view, a side view and a plan view of a first embodiment of a surgical microscope according to the present invention, and FIGS. 7 and 8 are an optical path diagram of a main part and a perspective view of an optical path splitting part of the second embodiment, respectively. 9 and 10 are a side view and a plan view of a conventional optical system. 11 ... Objective lens, 12 ... Variable magnification lens, 13 ... First reflecting member, 14 ... Second reflecting member, 15 ... Other reflecting member, 16 ... Third reflecting member, 17 ... Mirror body Department, 18 ...
... Light splitting unit (unit), 19 ... Imaging lens, 20 ...
... Eyepiece, 21 ... Lens barrel, 22 ... Semi-transparent second reflecting member, 23 ... Recording equipment.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Nagano 2 43-2, Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Takashi Fukaya 43-2-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Industry Co., Ltd. (72) Inventor Kazuyuki Minami 43-2 2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Industry Co., Ltd. (72) Inventor Toshiyuki Tsunoda 43-2 2 Hatagaya Shibuya-ku, Tokyo Olympus Optical Industry Within the corporation

Claims (1)

[Claims] 1. A surgical microscope in which a pair of left and right variable power optical systems are provided behind a common objective lens, and a light splitting member is provided behind each of the pair of variable power optical systems, and the pair of variable power is provided. In a plurality of directions having a predetermined angle with respect to a plane including the pair of variable power optical systems in a plane orthogonal to the optical axis of the optical system, a pair of observation optical paths are respectively directed. Surgical microscope.